Source : Webster's Revised Unabridged Dictionary (1913)

Portly \Port"ly\, a. [From {Port} demeanor.]
   1. Having a dignified port or mien; of a noble appearance;
      imposing.

   2. Bulky; corpulent. ``A portly personage.'' --Dickens.

Source : WordNet®

portly
     adj : euphemisms for `fat'; "men are portly and women are stout"
           [syn: {stout}]
     [also: {portliest}, {portlier}]